The geology-section publishes about anoxia and the significance of worms – University of Copenhagen

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26 September 2014

The geology-section publishes about anoxia and the significance of worms

Anoxia

The Geobiology and Minerals Section explores the chemical variety of Earth through space and time. In articles published in Nature Geoscience og Earth and Planetary Science Letters, section researcher Tais W. Dahl attempts to solve the mystery of anoxia and the significance of worms to the levels of oxygen on planet earth.T

Tais W. Dahl et al. 2014 have developed a framework to test whether anoxia played a role on stabilizing atmospheric O2 using a combination of carbon, sulphur and uranium isotope measurements in geological records.

Tais W. Dahl from the Danish Museum of Natural History

They applied this at the 500 Million year old SPICE event, and found evidence that anoxia was indeed self-propelling during the onset of the event. However, the termination of the event – predicted related to atmospheric oxygenation by simple Earth system models – is out of sync with the new data. Three more complex solutions are discussed.

This project was made in collaboration with Prof. M. Bizzarro and J. Connelly from StarPlan and the Earth and Planetary System Science section.